As luck would have it. I just ran across a Ford 8"-5 lug from a 1977 Maverick. 56.5" wms to wms. 2.79 gears but I should be able to change it if I don't like it.

I just went and checked the original rear end. It's 54.5" wms to wms. Rim mounting surface is centered on the rim. It's 60.5" outside of tire to outside of tire(not that it means much). Since I'm pushing 60 and this will be a daily driver, I think the 8" will work. Any opinions on 8" ford rear ends. (Yes I know I just took my own thread off the original topic.)